Metal bending machine



(No Model.)

J. BAUlVI.

METAL BENDING MACHINE.

Patented Mar. 7, 1893.,

7 UNITED STATES PATENT -QFFIGE.

JACOB BAUM, OF CINCINNATI, OHIO, ASSIGNOR TOTIIE VICTOR SAFE AND LOCKCOMPANY, OF SAME PLACE.

METAL-BENDING MACHINE.

SPECIFICATION forming part of Letters Patent No. 492,858, dated March'7, 1893.

Application filed October 31, 1892. Serial No. 450,493. (No model.)

To all whom it may concern.

Be it known that I, JACOB BAUM, a citizen of the United States, residingat Cincinnati, in the county of Hamilton and State of Ohio, haveinvented certain new and useful Improvements in Metal-Bending Machines;and I do hereby declare the following to bea full, clear, and exactdescription of the invention, reference being had to the annexeddrawings, which form part of this specification. I

My invention comprises a powerful ma chine designed more especially forbending plates and angle-irons to be subsequently used in themanufacture of safes and similar metallic structures, the details ofsaid machine and the method of operating it being hereinafter more fullydescribed.

In the annexed drawings,Figure 1 is a side elevation of my improvedbending-machine. Fig. 2 is an elevation of a portion of the oppositeside thereof. Fig. 3 is an end elevation. Figs. at and 5 are enlargedviews of details.

The principal member of the machine is a hollow base A, supported uponfeet B, and having secured to one end a heavy arm C, whose lower edgehas a flaring flange c, as represented in Fig. 4: for the readyattachment of one or more shiftable die-blocks D. Base A has a pair ofend lugs a, a, to which a stout tie-bar E is pivoted, the top of thisbar being provided with alug e, within which latter a clamp screw 6 istapped. c is a notch in the end of arm C, to admit this bar when swungup to the position shown in Figs. 1 and 3.

Adapted to be adjusted vertically on the base A is a table F, the shapeof which is more clearly seen in Fig. 4, the end of this table beingnotched at f to admit the bar E. Furthermore, the sides of this tableare slottedat f, to receive wedges G, that traverse corresponding slotsat, in the base A, the wedges, of which two or more may be used,

being supported upon cams or other lifters H, of a shaft h runninglongitudinally of said base. 9 are screws for adjusting these wedges, soas to impart a proper lift to the table F. Hinged to this table, nearits upper edge at i, is a folding-plate I, whose free edge has one ormore links J coupled to it, the opposite ends of these links beingconnected to arms K, projecting rigidly from a longitudinal rock-shaftL. This shaft is j ournaled in bearings projecting from the base, andhas at its ends cranks Z, Z. M, M, are rods connecting these cranks withsimilar devices n, n, secured to the ends of a longitudinalcounter-shaft N, each connecting rod being made of two pieces united byright and left hand screws to a common nut m, as seen in Fig. 3. By thisarrangement the proper throw of cranks Z, Z, can be readily secured, forthe purpose of efiecting a correct movement of the folder I. Shaft N hassecured to it near one end a wheel 0, gearing with a pinion 0' on themain shaft 0, which latter may have a fast and loose pulley, or beprovided with a clutch mechanism for starting and stopping the bender.Revolving loosely on said shaft is a pinion P, capable of being turnedby a pawl R, carried by a stirrup r. This stirrup is also fitted looselyon shaft N, and can be operated at any time, by inserting a lever in it,as indicated by the dotted line 10. Pinion P gears with a wheel Ssecured to the end of shaft h, said wheel being locked by a pawl s,pivoted to one of the lugs a.

My machine is operated in the following manner. Normally the uppersurface of folder I is flush with the top of table F, and being hingedto the latter, it will maintain this position when said table is bothraised and lowered. Furthermore, in this normal condition of themachine, the tie-bar E is swung down to the horizontal positionindicated by dotted lines in Fig. 1, thereby affording convenient accessto the table and per-- mitting the introduction of special forms ofplates or bars. A sufficient number of dieblocks D are applied to theflanged portion 0 of arm C, and the table F is adjusted approximately tothe required height, which adj ustment is readily effected by insertinga lever 5, within the stirrup r, and so operating said lever as to turnthe pinion P, wheel S, shaft h, and its attached cams G. Theseadjustments having been efiected, the plate T, seen only in Fig. 4, isplaced upon the table F, and folder I, and then the tie-bar E is swungup until its lug e, rests upon the arm 0, after which act, said bar isretained in place by tightening the .screwle. A few more turns are thengiven to pinion P, for the purpose of finally raising the table F, andthereby clamping the plate T immovably between it and the die-blocks D.The machine is now set in motion, the turning of shaft N causing arocking of the other shaft L, which gradually, but irresistibly bringsthe folder I up to the position seen in Figs. 1 and 3. Consequently, theplate T is bent at a right angle against the die-block D, as indicatedby dotted lines in Fig. 4. A reverse rocking of shaft L, brings thefolder I back to its normal position, and then the table is slightlylowered, the plate T shifted forward and another bend made in it. Bythis procedure, a single plate can be readily bent to form the top,bottom and sides of a safe, and after being bent to this box. shape, thetie-bar E is liberated and swung down, and then the box is readilyremoved from the machine. It will thus be seen that said bar performsthe twofold purpose of a tie that binds the arm to the base, so as toprevent said arm being sprung or broken, and it also facilitates theready removal of the bent article, no matter whether it is a plate,angle-iron or other piece of metal.

I claim as my invention 1. The combination, in a metal-bending machine,of a stationary base, an immovable arm rigidly secured at one end tosaid base and havingits other end coupled thereto by a shiftabletie-rod, a folding plate that bends the metal upwardly, and means foroperating said plate, substantially as herein described.

2. The combination,in a metal-bending machine, of a stationary base, animmovable arm rigidly secured at one end to said base and having itsother end coupled thereto by a shiftable tie-rod, avertically-adjustable table applied to said base, devices for raisingand lowerin g said table, a folding plate coupled to the latter andmeans for operating said plate,

substantially as herein described.

A metal-bending machine, including a base, a vertically-adjustable tableapplied to it, a folding plate coupled to said table, and a set of camscarried by a common shaft and adapted to elevate said table, in themanner described.

' 4. The combination, in a metal-bending machine, ofavertically-adjustable table, wedges upon which said table rests, andcams that operate said wedges, in the manner described.

5. The combination, in a metal-bending machine, of a stationary base, anarm rigidly secured to it at one end, and a swinging tie-rod thatcouples the other end of said arm to said base, for the purpose hereindescribed.-

6. The combination, in a metal-bending machine, of the stationary baseA, an arm 0 rigidly secured at one end to said base, and having a notchc at its other end,and the tie-rod E, pivoted to said base, the upperend of said rod being adapted to enter said notch, and having a lug e,that rests upon said arm, for the purpose described.

In testimony whereof I affix my signature in presence of two witnesses.

J AOOB BAUM.

Witnesses:

JAMES H. LAYMAN, FRANCIS M. BIDDLE.

